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arXiv 1602.01646hep-lathep-phhep-th
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2,3,4维时空中Landau规范鬼粒子模型

Modeling the Landau-Gauge Ghost Propagator in 2, 3 and 4 Space-Time Dimensions

Attilio Cucchieri, David Dudal, Tereza Mendes, Nele Vandersickel

摘要:

给出了格点上最小朗道规范中鬼传播子G(p^2)的数值结果的解析描述。这些数据是在SU(2)的情况下使用迄今为止最大的晶格体积产生的,d = 2,3和4时空维度。我们提出的G(p^2)形式是从鬼传播子和胶子传播子之间的单圈关系导出的,考虑了树级鬼胶子顶点和我们以前得到的胶子传播子结果\cite{Cucchieri:2011ig}。虽然这种单循环表达式并不能很好地描述数据,但它导致了我们的幽灵传播数据的单参数拟合,具有通常良好的χ^2/dof值,与文献中使用的其他拟合形式相当。同时,我们提出了一个简单的参数化的晶格数据和单循环预测之间的差异。

英文摘要:

We present an analytic description of numerical results for the ghost propagator G(p^2) in minimal Landau gauge on the lattice. The data were produced in the SU(2) case using the largest lattice volumes to date, for d = 2, 3 and 4 space-time dimensions. Our proposed form for G(p^2) is derived from the one-loop relation between ghost and gluon propagators, considering a tree-level ghost-gluon vertex and our previously obtained gluon-propagator results \cite{Cucchieri:2011ig}. Although this one-loop expression is not a good description of the data, it leads to a one-parameter fit of our ghost-propagator data with a generally good value of χ^2/dof, comparable to other fitting forms used in the literature. At the same time, we present a simple parametrization of the difference between the lattice data and the one-loop predictions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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